Is it mess up PHP FPM when update WHM cpanel?

We have cent os, apache, nginx VPS. It has one wordperss site (approximately 5,000 daily page previews).

When we are requesting from our hosting company to use PHP FPM for handle php, they mentioned that, in future when updating WHM cPanle it cause issues. Is it correct or not? Right now we use fast CGI for handle php.